If your professor stops responding to your emails or calls after you inform them that you are leaving their class for another job offer, it could mean a few different things:
Indifference or Disappointment: The professor might be indifferent or disappointed about your decision to leave the class. They might have invested time and effort in teaching you, and your departure could be seen as a loss.
Busy Schedule: Professors can have demanding schedules, especially if they are involved in research, administrative tasks, or other teaching responsibilities. It's possible that they are simply too busy to respond promptly.
Lack of Relevance: Depending on the context of your communication, the professor might feel that there is no further need for communication since you are leaving the class.
Professional Boundaries: Some professors maintain strict professional boundaries with their students. After being informed that you are leaving their class, they may choose not to engage in further communication to maintain those boundaries.
Misinterpretation of Intent: It's possible that the professor misinterpreted your message or thought you were upset with them for some reason, leading them to avoid responding.
Regardless of the reason, it's essential not to take their lack of response personally. Professors, like anyone else, can have their reasons for their actions. If you have an urgent matter or a legitimate reason to contact them, you can try sending a polite follow-up message or attempting to speak with them in person during their office hours.
However, if their lack of response persists and it's affecting your academic needs or progress, consider reaching out to your academic advisor or someone in the department to discuss your concerns and seek guidance. Sometimes, they can mediate or help address any issues that may arise from the situation.